Following are a number of back-translations as well as a sample translation for translators of Proverbs 29:21:

• Kupsabiny: “If a slave is given special care/whatever he wants from childhood,
  (he) will overturn/bring trouble to people later.” (Source: Kupsabiny Back Translation)
• Newari: “If, from childhood, servants are given
  whatever they ask for
  later on they will plunder everything you have.” (Source: Newari Back Translation)
• Hiligaynon: “If you (sing.) just pamper/(give-everything-they-want) your (sing.) servant from his youth, in the end he will-become your (sing.) problem.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The slave that you (sing.) exceedingly spoil/pamper starting-from his childhood (lit. smallness), he will cause- you (sing.) -sorrow at the (lit. its) end.” (Source: Kankanaey Back Translation)
• English: “If someone gives his servants everything that they want, starting from when they are young,
  some day those servants will take from him everything that he owns.” (Source: Translation for Translators)